Roller-bearing.



ri. L. BOCK.

ROLLER BEARING.

APPLICATION FILED JULY 16. I912.

Patented June 29, 19F,

2 SHEETS-SHEET 1.

WITNESSES:

jig n r 1 L E06 H. L. BUCK ROLLER sums.

APPLICATION FILED hLY $6, I912.

1 1 34351 Patented June 29, 1915 2 SHEETSSHET 2.

WIT/YE ATTOR/VEN mean snares HENRY L. B11 33, GE TOLEDG, OHIO, ASSIGNOR TQ "WILLIAM EMIL 308K, 01" TOLEDG} ROLLER-BEARING.

Specification of Letters Patent.

Patented dunefig, 39315 Application filed July 16, 1912. Serial No. waves of the combined radial load sustaining and end thrust type.

It is the object of the invention to obtain a thoroughly practical construction, and one in which the same ratio is maintained between all portions'ot the surfaces in rolling contact, whereby any interference of one portion with another is avoided. In the construction of roller bearings designed to both carry radial loads and take care of end thrust, diiiiculty is experienced in maintaining the same ratio between the relatively moving surfaces, respectively for sustaining the radial load and for the end thrust. On the other hand, where there is difi'erential speed this not only introduces an objectionable frictional element, but also tends to twist the rollers out of alinement. Constructions have been devised in which, when first placed in service, the ratio is v the same between. all relatively moving surconsists in features of faces; but these constructions are such that upon wearing of the parts the ratio is changed. I have avoided this diiliculty by a constructionin which the ratio between the moving surfaces is not only initially the same but will be maintained the same throughout the life of the bearing.

A. further feature of my improvement is the reinforcement of the end thrust contacting surfaces so as to reduce the wear to the minimum. i v

With these objects in viewthe invention construction as hereinafter set forth.

In the drawings: Figure 1 is a longitudinal section through one-half of a roller bearing embodying my improvement; Fig. 2 is a longitudinal section through the opposite half of a bearingembodying my improvement, showing a form of bearing of slightly modified construction; and Fig. 3 is an enlarged diagram showing the principle of construction.

A are conical rollers arranged concentrically about eoopera'tingeonical outer and inner race members B and C. v

are heads at the large ends of the rollers, which are of greater diameter than the extension of the cone, and are preferably separated from the ra dial bearing portion by grooves E and neck portions F of reduced diameter. The opposite sides of the head D have curved or spherical surfaces G and G, which are adapted to contact with end thrust bearings upon the members B and The surfaces on the latter are arranged C. at such angles that the point of contact between the same and the contacting spherical surfaces G and G is in exact alinement with the-conical surface of the roller. Thus, as shown, the point of contact H between the surface'G and the surface I of the end thrust bearing lies in the line H H, which is in the surface of the conical roller. in like manner the point of contact J'between the inner surface G and the end thrust bearing K is in the line J J, which lies in the-conical surface of the roll. Furthermore it will be observed that the surfaces G I and GK extendupon oppositesides of the points of contact H and J, to form reinforcements therefor.

With the specific construction shown, the surface I is formed on an integral portion of the member C, and an annular groove L is arranged between said surface and the conical surface engaging the conical portion of the roller, which groove provides clearance for the head I). The bearing K can be formed either as a portion of'the member 13 or as a separate member; and furthermore this hearing is not essential, as the conical rollers alone will take care of the end thrust in this direction. However, 9

where the bearing-K is used the work upon the conical roller relieved.

' To hold the rollers properly spaced and relatively positioned, a. suitable cage is provided, such as M, which forms no part of the present invention.

In the drawings, I have shown two opposed roller bearings, each of which is constructed as described. but the hearing may be variously modified according to the specific requirements ofthe various structures in which it is used.

In operation, end thrust upon the rotatable member will be transmitted through the conical surface C to the rollers and-from the latter to the conical race member B. There will however be 'a Wedging action upon the rollers tending to displace the same longitudinally, but this movement is prevented by the contact of the spherical surface G with the tangential surface I, and,

as already described, these surfaces beingin true rolling contact will not interfere with the freedom of the roller.

What I claim as my invention is:

1. In a roller bearing, the combination of a conical roller and a contacting conical race member having portions provided With opposed, slightly divergent, non-parallel end thrust surfaces contacting in a point Which isthe projection of the line of contact between the conical surfaces, said non-parallel surfaces both extending upon opposite sides of said point of contact being symmetrically arranged with respect to a straight line passing through said point and being of slight divergence to strongly reinforce the bearing point.

2'. In a roller bearing, a roller having a conical surface and a head at the large end of said roller having a spherical surface transverse to and extending upon opposite sides of the projection of said conical surface thereon, and conical race members in rolling contact With said conical roller on opposite sides thereof, the one of said. race members Whose conical surface forms the more acute angle to its axis being provided with an end thrust surface tangent to and,

bearing upon the spherical surface of said roller at a point in alinement with the line of contact between said roller and race member.

3. In a roller bearing, a roller having a conical surface and a head at the large end separated from said conical surface by a groove, the surfaces upon opposite ends of said head being spherical, and conical race members engaging said conical roller on opposite sides thereof and being provided With end thrustsurfaces extending tangent to and contacting with the respec-.

In testimony whereof I afiix my signature in presence of two Witnesses.

HENRY L. BOOK.

Witnesses:- JAMES P. BARRY, H. E. BOWMAN. 

